package com.example.study3.util;

public class TestCustomPackage {
    public static void main(String[] args) {
        String testStr1 = "Hello";
        String testStr2 = "";
        String testStr3 = null;

        // 使用自定义工具类的方法
        System.out.println("testStr1 is empty: " + StringUtils.isEmpty(testStr1));// false
        System.out.println("testStr2 is empty: " + StringUtils.isEmpty(testStr2));// true
        System.out.println("testStr3 is empty: " + StringUtils.isEmpty(testStr3));// true

        System.out.println("testStr1 is not empty: " + StringUtils.isNotEmpty(testStr1));// true
    }
}
